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A135970
Fibonacci(Mersenne primes): a(n) = Fibonacci(A000668(n)).
0
2, 13, 1346269, 155576970220531065681649693
OFFSET
1,1
COMMENTS
This sequence is a subsequence of A101342. The next term, a(5), has 1712 digits.
MATHEMATICA
k = {}; Do[If[PrimeQ[2^n - 1], AppendTo[k, Fibonacci[2^n - 1]]], {n, 1, 15}]; k
Fibonacci/@Select[Table[2^Prime[n]-1, {n, 5}], PrimeQ] (* Harvey P. Dale, May 06 2018 *)
KEYWORD
nonn
AUTHOR
Artur Jasinski, Dec 09 2007
STATUS
approved